Bob:
Read with interest your Tech Article, good stuff:
http://www.ncr-pca.org/tech/tech-cis.htm
The "Idle Speed Controller" you refer to is the Frequency Valve added to the K-Jetronic in 1980-83 with Lambda.
Auxillary Air Regulator (AAR) and Auxillary Air Valve (AAV) are two different components.
The AAR has a heater element that closes the valve as the engine warms up, it's open when cold for extra air during start-up.
The AAV is a vacuum-operated valve working in conjunction with the AAR.
AAR and AAV are often confused with one another.
There is also the non-adjustable Decel. Valve which looks like the AAV for years '80 to '83.
Before that, for '78-'79, the Decel. Valve was adjustable and looks quite different.
Every SC in the US was equipped with a AAR, AAV and Decel. Valve OEM stock.
The CIS is very reliable but it takes some studying to understand it.
That includes the various electrical components and switches.
Cheers.
__________________
1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD!
1995 seafoam-green 993 C2, LSD, Sport seats.
Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ".
